Hi members newbie here. Just recently purchased svs ultra bookshelf’s, ultra center and svs sub. I have a pretty outdated receiver, Yamaha rx-v860, was wondering would an upgrade be needed for the receiver or should I add an amp like an Emotiva basex A3. Why I’m saying 3 channel because if I decided on adding more speakers in near future, I could run them from the receiver. Thinking of upgrading because since the switch to svs from def techs studio monitor 55, the svs seem to be more power hungry and volume has to be turned up more. I tried the Marantz cinema 50 over the weekend and we all agreed that it felt like a lateral move so I returned. Usage will be 80% movies/tv. Thoughts/suggestions appreciated.